Law, M., A. Russo, E. Bertino, K. Broda, and J. Lobo. “Representing and Learning Grammars in Answer Set Programming”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 33, no. 01, July 2019, pp. 2919-28, doi:10.1609/aaai.v33i01.33012919.